<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示区 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false">
      </el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabCliked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" :options="catelist" :props="{ 
              expandTrigger: 'hover',
              label:'cat_name',
              value:'cat_id',
              children:'children'
              }" @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的Item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableDate" :key="item.attr_id">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableDate" :key="item.attr_id">
              <el-input v-model="item.attr_vals" placeholder=""></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action:表示图片要上传到的后台api地址 -->
            <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture"
              :headers='headerObj' :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- /富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce" >
            </quill-editor>
            <el-button type="primary" class="btnAdd" @click="Add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewPathDialogVisible" width="50%">
      <img :src="previewPath" class="previewImg">
    </el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'
  export default {
    data() {
      return {
        previewPathDialogVisible: false,
        //图片上传组件的headers请求头对象
        headerObj: {
          Authorization: window.sessionStorage.getItem('token'),

        },
        previewPath: '',
        uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
        manyTableDate: [],
        onlyTableDate: [],
        activeIndex: '0',
        addForm: {
          goods_name: '',
          goods_price: 0,
          goods_weight: 0,
          goods_number: 0,
          goods_cat: '', //商品所属的分类数组
          pics: [],
          goods_introduce:'',
          attrs:[]
        },
        addFormRules: {
          goods_name: [{
            required: true,
            message: '请输入商品名称',
            trigger: 'blur'
          }],
          goods_price: [{
            required: true,
            message: '请输入商品价格',
            trigger: 'blur'
          }],
          goods_weight: [{
            required: true,
            message: '请输入商品重量',
            trigger: 'blur'
          }],
          goods_cat: [{
            required: true,
            message: '请选择商品分类',
            trigger: 'blur'
          }],
        },
        //商品分类列表
        catelist: []
      }
    },
    created() {
      this.getCateList()
    },
    computed: {
      cateId() {
        if (this.addForm.goods_cat.length === 3) {
          return this.addForm.goods_cat[2]
        }
        return null
      }
    },
    methods: {
      //添加商品
       Add(){
        this.$refs.addFormRef.validate
        (async valid=>{
          if(!valid){
            return this.$message.error(`请填写必要的表单项!`)
          }
          //执行添加的业务逻辑
          //lodash cloneDeep(obj)
          const form=_.cloneDeep(this.addForm)
          form.goods_cat=form.goods_cat.join(',')
          console.log(form);
          //处理动态参数
          this.manyTableDate.forEach(item=>{
            const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals.join(' ')}
            this.addForm.attrs.push(newInfo)
          })
          //处理静态属性
          this.onlyTableDate.forEach(item=>{
            const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals}
            this.addForm.attrs.push(newInfo)
          })
          form.attrs=this.addForm.attrs
          console.log(form);
          //发起请求 添加商品
          //商品的名称必须是唯一的
           const {data:res}=await this.$axios.post('goods',form)
           console.log(res);
           if(res.meta.status!==201){
             return this.$message.error(`添加商品失败!`)
           }
           this.$message.success(`添加商品成功!`)
           this.$router.push('/goods')
        })
      },
      //处理移除图片的操作
      handleRemove(file) {
        console.log(file);
        // 1:获取将要删除的图片的临时路径
        const filePath = file.response.data.tmp_path;
        // 2:从pics数组中,找到这个图片对应的索引值
        const i = this.addForm.pics.findIndex(x => {
          x.pic = filePath
        })
        // 3:调用数组中的splice方法,把图片信息对象,从pics数组中移除
        this.addForm.pics.splice(i, 1)
        console.log(this.addForm);
      },
      //监听图片上传成功的时间
      handleSuccess(response) {
        console.log(response);

        const picInfo = {
          pic: response.data.tmp_path
        }
        //将图片信息对象push到pics数组中
        this.addForm.pics.push(picInfo)
        console.log(this.addForm);

      },
      //处理图片预览效果
      handlePreview(file) {
        console.log(file);
        this.previewPath = file.response.data.url
        this.previewPathDialogVisible = true
      },
      async tabCliked() {
        // console.log(this.activeIndex);
        //证明访问的是动态参数面板
        if (this.activeIndex === '1') {
          const {
            data: res
          } = await this.$axios.get(`categories/${this.cateId}/attributes`, {
            params: {
              sel: 'many'
            }
          })
          if (res.meta.status !== 200) {
            return this.$message.error(`获取动态参数列表失败!`)
          }
          console.log(res.data);
          res.data.forEach(item => {
            item.attr_vals =
              item.attr_vals.length === 0 ? [] :
              item.attr_vals.split(' ')
          })
          this.manyTableDate = res.data
        } else if (this.activeIndex === '2') {
          const {
            data: res
          } = await this.$axios.get(`categories/${this.cateId}/attributes`, {
            params: {
              sel: 'only'
            }
          })
          if (res.meta.status !== 200) {
            return this.$message.error(`获取静态属性列表失败!`)
          }
          console.log(res.data);
          this.onlyTableDate = res.data
        }
      },
      beforeTabLeave(activaName, oldActiveName) {
        // console.log('即将离开的标签页名称是'+oldActiveName);
        // console.log('即将进入的标签页名称是'+activaName);
        // return false
        if (oldActiveName == '0' && this.addForm.goods_cat.length !== 3) {
          this.$message.error(`请先选择商品分类`)
          return false
        }
      },
      //级联选择器选中项变化触发此函数
      handleChange() {
        // console.log(this.addForm.goods_cat);
        if (this.addForm.goods_cat.length !== 3) {
          this.addForm.goods_cat = []
        }

      },
      //获取所以商品分类数据
      async getCateList() {
        const {
          data: res
        } = await this.$axios.get(`categories`)
        if (res.meta.status !== 200) {
          this.$message.error(`查询商品分类失败`)
        }
        this.catelist = res.data
        // console.log(this.catelist);

      },
    }
  }
</script>
<style lang="less" scoped>
  .el-steps {
    margin: 20px;
  }

  .el-step__title {
    font-size: 13px;
  }

  .el-checkbox {
    margin: 0 10px 0 0 !important;
  }

  .previewImg {
    width: 100%;
  }
  .btnAdd {
    margin-top: 15px;
  }
</style>